基于超薄层MoS_(2)可饱和吸收体的被动调Q固体Nd∶YAG激光器

Passive Q-switched Solid-state Nd∶YAG Laser Based on Ultrathin MoS_(2) Saturable Absorber

利用超声剥离法制备了超薄层MoS_(2)纳米片分散液可饱和吸收体,以石英池为容器插入Nd∶YAG激光器的平凹谐振腔中,调节谐振腔镜的位置并增大泵浦功率,成功实现了Nd∶YAG激光器被动调Q脉冲输出。实验结果显示,泵浦功率为2.46 W时,激光器开始调Q运转。泵浦功率为14.55 W时,实现了485 mW的脉冲激光输出功率,重复频率为189.75 kHz,脉冲宽度为1.2μs,对应的最大脉冲能量为2.56μJ。结果表明,超薄层MoS_(2)分散液是适用于1064 nm波长固体激光器被动调Q运转的可饱和吸收体材料。

The ultrathin MoS_(2) nanosheet dispersion saturable absorber is prepared by ultrasonic peeling method.The quartz cell is used as a container and insert into the flat-concave cavity of the Nd∶YAG laser.By adjusting the position of the resonant cavity mirror and increasing the pump power,the passive Q-switched pulse output of the Nd∶YAG laser is successfully achieved.Experimental results show that when the pump power is 2.46 W,the laser starts Q-switched operation.When the pump power is 14.55 W,the maximum pulse laser output power of 485 mW is achieved,the repetition frequency is 189.75 kHz,the pulse width is 1.2μs,and the corresponding maximum pulse energy is 2.56μJ.The results show that the ultrathin MoS_(2) aqueous solution is a saturable absorber material suitable for passive Q-switching operation of 1064 nm wavelength solid-state lasers.